Example Code Ch 09-5

Example Code Ch 09-5
Consider the following class definition:
public class AClass
{
protected int x;
protected int y;
public AClass(int a, int b)
{
x = a;
y = b;
}
public int addEm()
{
return x + y;
}
public void changeEm()
{
x++;
y--;
}
public String toString()
{
return "" + x + " " + y;
}
}
-Refer to Example Code Ch 09-5: You want to extend AClass to BClass. BClass will have a third int instance data, z. Which of the following would best define BClass's constructor?

A) public BClass(int a, int b, int c)
{
Super(a, b, c) ;
}
B) public BClass(int a, int b, int c)
{
X = a;
Y = b;
Z = c;
}
C) public BClass(int a, int b, int c)
{
Z = c;
}
D) public BClass(int a, int b, int c)
{
Super(a, b) ;
Z = c;
}
E) public BClass(int a, int b, int c)
{
Super() ;
}